Motor insulation class, temperature limit value
Motor parameters insulation level is a very important parameter, because it determines the motor winding temperature limit value. Common motor insulation class is divided into several kinds and motor temperature limit is how much respectively?
Class B insulation - 130 ℃; motor winding temperature limit of 130 ℃
F-class insulation - 155 ℃; motor winding temperature limit of 155 ℃
Class H insulation - 180℃: the temperature limit of motor winding is 180℃.
Class C insulation - above 180℃ ;Temperature limit value of motor winding is above 180℃.
Description of elaboration: the motor winding is composed of copper wire according to a certain solution, due to the passage of current, in order to stop the leakage of electricity, so there should be insulation system to ensure the quiet and reliable operation of the motor. Insulation system includes slot insulation, insulation between phases, slot wedge, insulating paint, etc., and these insulating materials or insulating paint is a grade, the maximum temperature permitted by each grade is also different, when overriding the maximum temperature it can withstand, insulation will not work. The higher the insulation grade, the higher the cost of the motor.
